Bambino Mio makes its nappy from certified organic cotton and hemp, both of which are plant fibres, but Bambino Mio relies on a PUL (polyurethane laminate) waterproof cover, so Bambino Mio is part-natural rather than pure plant fibre. Bambino Mio is an independent UK company that manufactures in Brixworth, Northamptonshire. Bambino Mio is honest that its covers are PUL and does not claim the system is plastic-free, which is why Bambino Mio scores in the middle rather than failing outright.